42 static void reconstruct(
char* filename,
int N,
int M,
int iteration,
int weight)
54 double t,epsilon=0.0000003;
56 unsigned infft_flags = CGNR | PRECOMPUTE_DAMP;
57 double time,min_time,max_time,min_inh,max_inh;
69 ftime=fopen(
"readout_time.dat",
"r");
70 finh=fopen(
"inh.dat",
"r");
72 min_time=INT_MAX; max_time=INT_MIN;
75 fscanf(ftime,
"%le ",&time);
84 Ts=(min_time+max_time)/2.0;
86 min_inh=INT_MAX; max_inh=INT_MIN;
89 fscanf(finh,
"%le ",&w[j]);
97 N3=ceil((
NFFT_MAX(fabs(min_inh),fabs(max_inh))*(max_time-min_time)/2.0)*4);
100 W=
NFFT_MAX(fabs(min_inh),fabs(max_inh))*2.0;
102 fprintf(stderr,
"3: %i %e %e %e %e %e %e\n",N3,W,min_inh,max_inh,min_time,max_time,Ts);
105 my_N[0]=N;my_n[0]=ceil(N*sigma);
106 my_N[1]=N; my_n[1]=ceil(N*sigma);
107 my_N[2]=N3; my_n[2]=ceil(N3*sigma);
108 nnfft_init_guru(&my_plan, 3, N*N, M, my_N,my_n,m,
109 PRE_PSI| PRE_PHI_HUT| MALLOC_X| MALLOC_V| MALLOC_F_HAT| MALLOC_F );
117 infft_flags = infft_flags | PRECOMPUTE_WEIGHT;
123 if(my_iplan.
flags & PRECOMPUTE_WEIGHT)
125 fin=fopen(
"weights.dat",
"r");
128 fscanf(fin,
"%le ",&my_iplan.
w[j]);
134 if(my_iplan.
flags & PRECOMPUTE_DAMP)
140 double r=sqrt(j2*j2+k2*k2);
142 my_iplan.
w_hat[j*N+k]=0.0;
144 my_iplan.
w_hat[j*N+k]=1.0;
150 fin=fopen(filename,
"r");
151 ftime=fopen(
"readout_time.dat",
"r");
155 fscanf(fin,
"%le %le %le %le ",&my_plan.
x[3*j+0],&my_plan.
x[3*j+1],&real,&imag);
156 my_iplan.
y[j]=real+ _Complex_I*imag;
157 fscanf(ftime,
"%le ",&my_plan.
x[3*j+2]);
159 my_plan.
x[3*j+2] = (my_plan.
x[3*j+2]-Ts)*W/N3;
166 my_plan.
v[3*(N*j+l)+0]=(((
double) j) -(((
double) N)/2.0))/((
double) N);
167 my_plan.
v[3*(N*j+l)+1]=(((
double) l) -(((
double) N)/2.0))/((
double) N);
168 my_plan.
v[3*(N*j+l)+2] = w[N*j+l]/W ;
174 nnfft_precompute_psi(&my_plan);
191 solver_before_loop_complex(&my_iplan);
192 for(l=0;l<iteration;l++)
197 fprintf(stderr,
"%e, %i of %i\n",sqrt(my_iplan.
dot_r_iter),
203 t = nfft_elapsed_seconds(t1,t0);
205 fout_real=fopen(
"output_real.dat",
"w");
206 fout_imag=fopen(
"output_imag.dat",
"w");
208 for(k=0;k<my_plan.
N_total;k++) {
210 my_iplan.
f_hat_iter[k]*=cexp(2.0*_Complex_I*
PI*Ts*w[k]);
212 fprintf(fout_real,
"%le ", creal(my_iplan.
f_hat_iter[k]));
213 fprintf(fout_imag,
"%le ", cimag(my_iplan.
f_hat_iter[k]));
225 nnfft_finalize(&my_plan);
230 int main(
int argc,
char **argv)
233 printf(
"usage: ./reconstruct_data_inh_nnfft FILENAME N M ITER WEIGHTS\n");
237 reconstruct(argv[1],atoi(argv[2]),atoi(argv[3]),atoi(argv[4]),atoi(argv[5]));